JP6842982B2 - Protective element - Google Patents

Protective element Download PDF

Info

Publication number
JP6842982B2
JP6842982B2 JP2017084089A JP2017084089A JP6842982B2 JP 6842982 B2 JP6842982 B2 JP 6842982B2 JP 2017084089 A JP2017084089 A JP 2017084089A JP 2017084089 A JP2017084089 A JP 2017084089A JP 6842982 B2 JP6842982 B2 JP 6842982B2
Authority
JP
Japan
Prior art keywords
electrodes
protective
protective element
pair
insulating plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2017084089A
Other languages
Japanese (ja)
Other versions
JP2018181779A (en
Inventor
憲之 前田
憲之 前田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott Japan Corp
Original Assignee
Schott Japan Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schott Japan Corp filed Critical Schott Japan Corp
Priority to JP2017084089A priority Critical patent/JP6842982B2/en
Publication of JP2018181779A publication Critical patent/JP2018181779A/en
Application granted granted Critical
Publication of JP6842982B2 publication Critical patent/JP6842982B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Fuses (AREA)

Description

本発明は電気・電子機器の保護素子に関する。 The present invention relates to a protective element for electrical / electronic equipment.

近年、モバイル機器など小型電子機器の急速な普及に伴い、搭載する電源の保護回路に実装される保護素子も小型薄型のものが使用されている。二次電池パックの保護回路には、例えば特許文献1に記載されるような表面実装部品(SMD)の保護素子が好適に利用される。これらの保護素子には、被保護機器の過電流により生ずる過大発熱や過電圧などの異常状態を検知し、または周囲温度の異常過熱に感応して、所定条件でヒューズを作動させ電気回路を遮断する非復帰型保護素子がある。該保護素子は、機器の安全を図るために、保護回路が機器に生ずる異常を検知すると信号電流により抵抗素子を発熱させ、その発熱で可融性の合金材からなるヒューズエレメントを溶断させて回路を遮断するか、あるいは過電流によってヒューズエレメントを溶断させて回路を遮断する。 In recent years, with the rapid spread of small electronic devices such as mobile devices, small and thin protective elements mounted on the protection circuit of the power supply to be mounted have been used. For the protection circuit of the secondary battery pack, for example, a protection element of a surface mount component (SMD) as described in Patent Document 1 is preferably used. These protective elements detect abnormal conditions such as overheating and overvoltage caused by overcurrent of the protected device, or respond to abnormal overheating of the ambient temperature and operate a fuse under predetermined conditions to cut off the electric circuit. There is a non-resettable protective element. In order to ensure the safety of the equipment, the protection element heats the resistance element by the signal current when the protection circuit detects an abnormality that occurs in the equipment, and the heat generation blows the fuse element made of a fusible alloy material. The fuse element is blown by an overcurrent to cut off the circuit.

例えば、特許文献1などに記載されるように、はんだ付け温度で溶融する低融点金属材と、低融点金属材に溶解性の金属構造材を積層して成るヒューズエレメント材を用いた保護素子がある。この保護素子のヒューズエレメント材は、はんだ付け作業で液相化した低融点金属材を、その温度で固相の金属構造材に界面張力で付着させて一定時間溶断しないように支えて保持することで、少なくともはんだ付け作業の間、ヒューズエレメントの形状を維持してヒューズエレメント材がリフローはんだ付けで誤動作するのを防止する。はんだ付けが完了し回路保護素子が被保護回路に実装されると、ヒューズエレメント材の金属構造材は、はんだ付けの熱で媒質である低融点金属材中に拡散または溶解されて薄層化しているので、設置環境の異常過熱や内蔵する抵抗発熱素子のヒータ加熱により容易に消失し、以後溶断を妨げることなく動作するようになる。 For example, as described in Patent Document 1 and the like, a protective element using a low melting point metal material that melts at a soldering temperature and a fuse element material formed by laminating a soluble metal structural material on a low melting point metal material is provided. is there. The fuse element material of this protective element is to support and hold a low melting point metal material that has been liquid-phased by soldering work to a solid-phase metal structural material at that temperature with interfacial tension so that it will not melt for a certain period of time. The shape of the fuse element is maintained at least during the soldering operation to prevent the fuse element material from malfunctioning during reflow soldering. When the soldering is completed and the circuit protection element is mounted on the protected circuit, the metal structural material of the fuse element material is diffused or melted in the low melting point metal material which is the medium by the heat of soldering and becomes thin. Therefore, it easily disappears due to abnormal overheating of the installation environment or heating of the built-in resistance heating element by the heater, and thereafter, it can operate without hindering fusing.

特開2015−079608号公報JP-A-2015-079608

本発明は、上述の保護素子の構成を簡略化して、さらなる小型薄型化に対応可能な保護素子を提供することを目的とする。 An object of the present invention is to simplify the configuration of the above-mentioned protective element and provide a protective element capable of further reducing the size and thickness.

本発明によると、枠体と、この枠体の内側面に設けた少なくとも一対の凹み部と、少なくとも一対の電極と両電極に接続された発熱体を有し該枠体に収容した絶縁板と、該凹み部に充填した低融点金属材からなるエレメント溶食材と、このエレメント溶食材と該絶縁板の少なくとも片側の電極に当接して固着した高融点金属材からなるヒューズエレメントで構成したことを特徴とする保護素子が提供される。絶縁板は絶縁材であれば何れの材料・組成のものでもよい。絶縁板に設けた電極は、導電材であれば何れの材料・組成のものでもよい。発熱体は、ヒータ機能を具備するものであれば材料等を特に限定されない。エレメント溶食材は、ヒューズエレメントより低融点の金属材からなり、かつ溶融状態でヒューズエレメントを溶食する材料であれば何れの材料・組成のものでもよい。必要ならばエレメント溶食材の表面を融剤すなわちフラックスで被覆してもよい。 According to the present invention, an insulating plate having a frame body, at least a pair of recesses provided on the inner surface of the frame body, at least a pair of electrodes and a heating element connected to both electrodes, and housed in the frame body. It is composed of an element-melted food material made of a low-melting-melt metal material filled in the recess, and a fuse element made of a high-melting-melt metal material fixed to the element melted food material in contact with an electrode on at least one side of the insulating plate. A featured protective element is provided. The insulating plate may be of any material and composition as long as it is an insulating material. The electrode provided on the insulating plate may be of any material and composition as long as it is a conductive material. The material or the like of the heating element is not particularly limited as long as it has a heater function. The element-dissolved food material may be any material and composition as long as it is made of a metal material having a melting point lower than that of the fuse element and erodes the fuse element in a molten state. If necessary, the surface of the element-dissolved food material may be coated with a flux, that is, a flux.

保護素子の構成を簡略化して小型薄型化に寄与する。 It contributes to miniaturization and thinning by simplifying the configuration of the protective element.

本発明に係る保護素子10の平面図を示す。The plan view of the protection element 10 which concerns on this invention is shown. 本発明に係る保護素子10であり、(a)は図1のA−A線に沿って切断した正面断面図を示し、(b)は図1のB−B線に沿った右側面断面図を示す。The protective element 10 according to the present invention, (a) shows a front sectional view cut along the line AA of FIG. 1, and (b) is a cross-sectional view of the right side along the line BB of FIG. Is shown. 本発明に係る保護素子10の下面図を示す。The bottom view of the protection element 10 which concerns on this invention is shown. 本発明に係る保護素子20の平面図を示す。The plan view of the protection element 20 which concerns on this invention is shown. 本発明に係る保護素子20であり、(a)は図4のA−A線に沿って切断した正面断面図を示し、(b)は図4のB−B線に沿った右側面断面図を示す。The protective element 20 according to the present invention, (a) shows a front sectional view cut along the line AA of FIG. 4, and (b) is a cross-sectional view of the right side along the line BB of FIG. Is shown. 本発明に係る保護素子20の下面図を示す。The bottom view of the protection element 20 which concerns on this invention is shown.

本発明に係る保護素子10は、図1、図2および図3に示すように、キャビティ11とキャビティ11の内側面に設けた少なくとも一対の凹み部12を有する枠体13と、少なくとも一対の電極14と両電極に接続された発熱体15を有し枠体13のキャビティ11に収容した絶縁板16と、凹み部12に充填した低融点金属材からなるエレメント溶食材17と、エレメント溶食材17と絶縁板16の少なくとも片側の電極に当接して固着した高融点金属材からなるヒューズエレメント18で構成したことを特徴とする。上記保護素子の絶縁板16は絶縁材であれば何れの材料・組成のものでもよく、例えば、ガラス、ガラスセラミック、セラミック、ガラスエポキシなどが好適である。絶縁板16に設けた電極14は、導電材であれば何れの材料・組成のものでもよく、例えば、積層セラミック基板の内部電極に用いられる金属ペーストを焼結して形成された焼結電極などが使用できる。発熱体15は、ヒータ機能を具備するものであれば材料等を特に限定されないが、例えば厚膜抵抗素子が好適である。エレメント溶食材17は、ヒューズエレメント18より低融点の金属材からなり、かつ溶融状態でヒューズエレメント18を溶食する材料であれば何れの材料・組成のものでもよいが、例えば錫や軟ロウ材のはんだ材が好適である。エレメント溶食材17は、さらに必要に応じてその表面を、例えばロジン系フラックスなどの融剤で被覆してもよい。ヒューズエレメント18は、エレメント溶食材17より高融点の金属材からなり、かつ固体状態でエレメント溶食材17に溶解する材料であれば何れの材料・組成のものでもよいが、例えば銀材が好適である。 As shown in FIGS. 1, 2 and 3, the protective element 10 according to the present invention includes a cavity 11 and a frame body 13 having at least a pair of recesses 12 provided on the inner surface of the cavity 11, and at least a pair of electrodes. An element-dissolved food material 17 composed of an insulating plate 16 having a heating element 15 connected to 14 and a heating element 15 connected to both electrodes and housed in a cavity 11 of a frame body 13, a low-melting metal material filled in a recess 12, and an element-dissolved food material 17 It is characterized in that it is composed of a fuse element 18 made of a refractory metal material which is in contact with and fixed to an electrode on at least one side of the insulating plate 16. The insulating plate 16 of the protective element may be of any material and composition as long as it is an insulating material, and for example, glass, glass ceramic, ceramic, glass epoxy and the like are suitable. The electrode 14 provided on the insulating plate 16 may be of any material and composition as long as it is a conductive material. For example, a sintered electrode formed by sintering a metal paste used for an internal electrode of a laminated ceramic substrate or the like. Can be used. The material of the heating element 15 is not particularly limited as long as it has a heater function, but for example, a thick film resistance element is suitable. The element molten food material 17 may be made of a metal material having a melting point lower than that of the fuse element 18 and may be any material and composition as long as it is a material that erodes the fuse element 18 in a molten state. For example, tin or a soft solder material may be used. Solder material is suitable. The surface of the element-dissolved food material 17 may be further coated with a flux such as a rosin-based flux, if necessary. The fuse element 18 may be of any material and composition as long as it is made of a metal material having a melting point higher than that of the element-dissolved food material 17 and can be dissolved in the element-dissolved food material 17 in a solid state. For example, a silver material is preferable. is there.

本発明に係る保護素子20は、上記保護素子10の枠体13のキャビティ11を打ち抜き孔21に変形した変形例であって、図4、図5および図6に示すように、枠体23と、枠体23の内側面に設けた少なくとも一対の凹み部22と、少なくとも一対の電極24と両電極に接続された発熱体25を有し枠体23に収容した絶縁板26と、凹み部22に充填した低融点金属材からなるエレメント溶食材27と、エレメント溶食材27と絶縁板26の少なくとも片側の電極に当接して固着した高融点金属材からなるヒューズエレメント28で構成したことを特徴とする。保護素子20は、保護素子10の枠体13のキャビティ11を打ち抜き孔21に変形したことで、さらなる低背化を実現する。 The protective element 20 according to the present invention is a modified example in which the cavity 11 of the frame body 13 of the protective element 10 is deformed into a punched hole 21, and as shown in FIGS. 4, 5 and 6, the frame body 23 and the protective element 20 An insulating plate 26 having at least a pair of recesses 22 provided on the inner surface of the frame 23, a heating element 25 connected to at least a pair of electrodes 24 and both electrodes, and housed in the frame 23, and a recess 22. It is characterized in that it is composed of an element molten metal material 27 made of a low melting point metal material filled in, and a fuse element 28 made of a high melting point metal material which is in contact with and fixed to an electrode on at least one side of the element melting material 27 and the insulating plate 26. To do. The protective element 20 realizes further reduction in height by deforming the cavity 11 of the frame body 13 of the protective element 10 into a punched hole 21.

本発明に係る実施例1の保護素子10は、図1ないし図3に示すように、キャビティ11とキャビティ11の内側面に設けた一対の凹み部12を有する液晶プラスチックの枠体13と、銀ペーストを焼結して成る一対の銀電極14と両電極に接続された厚膜抵抗素子からなる発熱体15を有し枠体13のキャビティ11に挿着したアルミナ・セラミックの絶縁板16と、凹み部12に充填したSn−0.75Cu合金のエレメント溶食材17と、エレメント溶食材17と絶縁板16の片側の焼結銀電極に接合した純銀材のヒューズエレメント18で構成したことを特徴とする。 As shown in FIGS. 1 to 3, the protective element 10 of the first embodiment according to the present invention includes a cavity 11 and a liquid crystal plastic frame 13 having a pair of recesses 12 provided on the inner surface of the cavity 11 and silver. An alumina-ceramic insulating plate 16 having a pair of silver electrodes 14 formed by sintering paste and a heating element 15 composed of a thick film resistance element connected to both electrodes and inserted into the cavity 11 of the frame body 13. It is characterized by being composed of a Sn-0.75 Cu alloy element molten material 17 filled in the recess 12 and a sterling silver fuse element 18 bonded to the element molten material 17 and the sintered silver electrode on one side of the insulating plate 16. To do.

本発明に係る実施例2の保護素子20は、実施例1の保護素子10を変形したもので、図4ないし図6に示すように、液晶プラスチックの枠体23と、枠体23の内側面に設けた一対の凹み部22と、銀ペーストを焼結して成る一対の電極24と両電極に接続された厚膜抵抗素子からなる発熱体25を有し枠体23の打ち抜き孔21に接着したアルミナ・セラミックの絶縁板26と、凹み部22に充填した錫のエレメント溶食材27と、エレメント溶食材27と絶縁板26の片側の電極に接合した純銀材のヒューズエレメント28で構成したことを特徴とする。 The protective element 20 of the second embodiment according to the present invention is a modification of the protective element 10 of the first embodiment, and as shown in FIGS. 4 to 6, the liquid crystal plastic frame 23 and the inner surface of the frame 23. It has a pair of recessed portions 22 provided in the above, a pair of electrodes 24 formed by sintering silver paste, and a heating element 25 composed of a thick film resistance element connected to both electrodes and adhered to a punched hole 21 of the frame body 23. It was composed of an alumina-ceramic insulating plate 26, a tin element molten material 27 filled in the recess 22, and a sterling silver fuse element 28 bonded to the electrode on one side of the element molten material 27 and the insulating plate 26. It is a feature.

上記実施例1および実施例2の保護素子は、純銀材のヒューズエレメントを用いたことで内部抵抗値の低抵抗化も実現する。 By using a fuse element made of sterling silver for the protective elements of Examples 1 and 2, the internal resistance value can be reduced.

本発明の保護素子は、電池パックなど2次電池の保護装置に利用できる。 The protective element of the present invention can be used as a protective device for a secondary battery such as a battery pack.

10、20・・・保護素子、
11、21・・・キャビティまたは打ち抜き孔
12、22・・・凹み部、
13、23・・・枠体、
14、24・・・電極、
15、25・・・発熱体、
16、26・・・絶縁板、
17、27・・・エレメント溶食材、
18、28・・・ヒューズエレメント。
10, 20 ... Protective element,
11, 21 ... Cavity or punched hole 12, 22 ... Recessed part,
13, 23 ... Frame,
14, 24 ... Electrodes,
15, 25 ... Heating element,
16, 26 ... Insulation plate,
17, 27 ... Element melted ingredients,
18, 28 ... Fuse element.

Claims (1)

枠体と、この枠体の内側面に設けた少なくとも一対の凹み部と、少なくとも下面に設けた一対の電極と両電極に接続された発熱体を有し前記枠体に露出面を除いて挿着または接着した絶縁板と、前記凹み部に充填した低融点金属材からなるエレメント溶食材と、このエレメント溶食材と前記絶縁板の少なくとも片側の前記電極に当接して固着した高融点金属材からなるヒューズエレメントで構成したことを特徴とする保護素子。 It has a frame, at least a pair of recesses provided on the inner surface of the frame, a pair of electrodes provided on at least the lower surface, and a heating element connected to both electrodes, and is inserted into the frame except for an exposed surface. and wear or adherent insulating plate, and elements erosion material made of low melting point metal material filled in the recessed portion, a refractory metal material having fixed contact with the at least one side said electrodes of said dielectric plate and the element erosion material A protective element characterized by being composed of a fuse element.
JP2017084089A 2017-04-21 2017-04-21 Protective element Active JP6842982B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017084089A JP6842982B2 (en) 2017-04-21 2017-04-21 Protective element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017084089A JP6842982B2 (en) 2017-04-21 2017-04-21 Protective element

Publications (2)

Publication Number Publication Date
JP2018181779A JP2018181779A (en) 2018-11-15
JP6842982B2 true JP6842982B2 (en) 2021-03-17

Family

ID=64275883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017084089A Active JP6842982B2 (en) 2017-04-21 2017-04-21 Protective element

Country Status (1)

Country Link
JP (1) JP6842982B2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6322599Y2 (en) * 1984-12-17 1988-06-21
JP2014022050A (en) * 2012-07-12 2014-02-03 Dexerials Corp Protection element
JP6102266B2 (en) * 2013-01-11 2017-03-29 株式会社村田製作所 fuse
JP2015079608A (en) * 2013-10-16 2015-04-23 エヌイーシー ショット コンポーネンツ株式会社 Fuse element material for protection element and circuit protection element using the same
JP2016110742A (en) * 2014-12-03 2016-06-20 デクセリアルズ株式会社 Protection element and electronic apparatus

Also Published As

Publication number Publication date
JP2018181779A (en) 2018-11-15

Similar Documents

Publication Publication Date Title
TWI398894B (en) Protection element
TWI610328B (en) Fuse unit and fuse element
JP6437262B2 (en) Mounting body manufacturing method, thermal fuse element mounting method, and thermal fuse element
JP5130233B2 (en) Protective element
JP7231527B2 (en) Fuse element for protection element and protection element using the same
JP6371118B2 (en) Protective element and battery pack
JP2007059295A (en) Circuit protective element and protection method of circuit
JP7050019B2 (en) Protective element
TWI676202B (en) Protective component
WO2017163766A1 (en) Protection element
JP6711704B2 (en) Protective device with bypass electrode
CN109727833A (en) Protection element and its circuit protection device
JP6842982B2 (en) Protective element
JP2005150075A (en) Alloy type thermal fuse and protecting device using it
JP7154090B2 (en) protective element
JP7040886B2 (en) Protective element
JP2009070803A (en) Temperature fuse with resistor and battery protection circuit board
JP4112297B2 (en) Thermo protector and method of manufacturing thermo protector
CN112789703B (en) Protection element
JP2020126821A (en) Protection element
JP2021018983A (en) Protection element
JP2023126322A (en) circuit module

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20191212

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200924

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200929

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20201021

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20210217

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20210222

R150 Certificate of patent or registration of utility model

Ref document number: 6842982

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250